SKU:95411961858
National Union NU 807 JAN-CNU-807 Vacuum Tube Milspec
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- USA
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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10
Description
National Union NU 807 JAN-CNU-807 Vacuum Tube MilspecThis new old stock TESTING National Union 807 output tube was tested on our Maxi Matcher 2 for shorts, gas and transconductance with 400 volts on the plates and a bias of 48 volts. There were no shorts or gas. Plate current draw was 20 milliamps while transconductance measured 2450 micromhos. (New 807s typically test from the mid teens to mid 30s with transconductance from 2200 micromhos). I am playing it now in my Musical Paradise 301 MK 3 (with an
new in box GE 6DX8 / ECL84 tube tested to spec on our Paul Hart-calibrated TV7/U
bottom D getters
There were no shorts or gas and they measured 30
where minimum (65%) is 18/18 and 100% is 28/28
new in box RCA 17AY3 / 17AY3A / 17BS3 / 17BS3A tubes tested to spec on our Paul Hart-calibrated TV7/U
new in box RCA 6JN6 tube tested to spec on our Paul Hart-calibrated TV7/U
Plate current draw was 29 milliamps for Tube One and 31
These five Ken-Rad number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U
new in box Sylvania Gold Brand industrial 6AL5 / 5726 / 6097 tubes tested to spec on our Paul Hart-calibrated TV7/U
Tube One measured 30 while Tube Two measured 32 where minimum (65%) is 22 and 100% is 49
new in box RCA 25DN6 tubes tested to spec on our Paul Hart-calibrated TV7/U
dynamics and frequency response
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